(Appendix 68) Inventory Costing Methodsi Periodic Average Cost Filimonov foc, has the following information related to purchases and sales of one of its inventorvitems: Assume that Filimonov uses a periodic inventory system. Required: Calculate the cost of goods sold and the cost of ending inventory using the average cost method. (Note: Use four decimal places for per-unit calculations and round all other numbers to the nearest dollar.)